Which of the following statements is true about Native American languages?

The statement about Native American languages being classified into more than 20 language families is accurate. This diversity reflects the vast range of cultures and experiences of Native American tribes across North America, each developing their own distinct languages and dialects. The existence of numerous language families highlights the complexity and variety of indigenous languages prior to European contact, demonstrating that not all Native American peoples communicated in a single language or were part of a single linguistic branch.

In contrast, while it is true that many Native American languages lacked a written form, this statement does not account for the linguistic diversity and family classification; thus, it is not as comprehensive as the correct option. The notion that Native American languages were only spoken by men is inaccurate, as language is a communal aspect of culture that involves both genders. The suggestion that all Native American languages are merely dialects of one language ignores the rich linguistic heritage that encompasses individual tribal identities and histories. Therefore, recognizing the existence of over 20 distinct language families is a true reflection of the complex linguistic landscape of Native American cultures.